This points directly at the heater core as the failure.
You have hot hoses and heat above idle. You have a clog in the core that slows the circulation.
Roy
WARNING:
- ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- IF THE VEHICLE IS EQUIPPED WITH AIR CONDITIONING, REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PERFORMING THE FOLLOWING OPERATION. See: Heating and Air Conditioning > Technician Safety Information
1. Remove the HVAC housing. Refer to Housing Assembly HVAC/Service and Repair/Procedures See: Housing Assembly HVAC > Removal and Replacement > HVAC Housing - Removal and Installation
Fig.14 Heater Core Removal/Installation
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2. Remove the two heater core retaining screws (if equipped).
3. Gently push back on two of the heater core retaining tabs and pull up on heater core to remove.
INSTALLATION
WARNING: IF THE VEHICLE IS EQUIPPED WITH AIR CONDITIONING, REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PERFORMING THE FOLLOWING OPERATION. See: Heating and Air Conditioning > Technician Safety Information
1. Install the heater core into the top of the HVAC housing.
2. Push on top of heater core until all for tabs are locked into place.
3. Install the two heater core retainer screws.
4. Install the HVAC housing. Refer to Housing Assembly HVAC/Service and Repair/Procedures
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Monday, September 21st, 2020 AT 10:14 AM